2-Methyl-4-oxy-5-oxymethyl-isonicotinsaeurehydrazid [German] 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinic acid hydrazide 4-Pyridinecarboxylic acid, 3-hydroxy-5-(hydroxymethyl)-2-methyl-, hydrazide Isonicotinic acid, 3-hydroxy-5-(hydroxymethyl)-2-methyl-, hydrazide NS1801000